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(11)

EP 2 167 424 A1

(12)

(43) Date of publication: 31.03.2010 Bulletin 2010/13 (21) Application number: 08772822.6 (22) Date of filing: 23.06.2008

(51) International Patent Classification (IPC):  C01B 21/42(2006.01) C01B 21/46(2006.01) C01B 21/38(2006.01) (86) International application number: PCT/CA2008/001159 (87) International publication number: WO 2009/000072 (31.12.2008 Gazette 2009/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 22.06.2007 US 945725 P (71) Applicant: Royal Canadian Mint Ottawa, Ontario K1A 0G8 (CA)	(72) Inventors: HARRIS, Bryn Montréal, Québec H2X 2L4 (CA) WHITE, Carl Gaspe, Québec J9J 1J6 (CA) APRAHAMIAN, Vicken Gatineau, Québec J9J 1J6 (CA) (74) Representative: Maggs, Michael Norman et al Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)